C#•2y ago

✅ How to edit and save specific appsettings.json (project root) section?

Hello, I have issue with editing specific section in the appsettings.json in project root folder, but now it overwrites all he file although it should overwrite only the specific section

   
public void SetYear(int year)
        {
            var config = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddEnvironmentVariables()
                .Build()
                .Get<Config>();

            config.ConfigurableYear = year;

            var jsonWriteOptions = new JsonSerializerOptions()
            {
                WriteIndented = true,
                
            };

            var newJson = JsonSerializer.Serialize(config, jsonWriteOptions);

            var appSettingsPath = Path.Combine(Directory.GetCurrentDirectory(), "appsettings.json");
            File.WriteAllText(appSettingsPath, newJson);
            
        }

   
public void SetYear(int year)
        {
            var config = new ConfigurationBuilder()
                .SetBasePath(Directory.GetCurrentDirectory())
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true)
                .AddEnvironmentVariables()
                .Build()
                .Get<Config>();

            config.ConfigurableYear = year;

            var jsonWriteOptions = new JsonSerializerOptions()
            {
                WriteIndented = true,
                
            };

            var newJson = JsonSerializer.Serialize(config, jsonWriteOptions);

            var appSettingsPath = Path.Combine(Directory.GetCurrentDirectory(), "appsettings.json");
            File.WriteAllText(appSettingsPath, newJson);
            
        }

30 Replies

Unknown User•2y ago

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kaziuxOP•2y ago

I use on the local env. This is service function which used on the api endpoint

Unknown User•2y ago

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kaziuxOP•2y ago

nope, I do just API call.

Unknown User•2y ago

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kaziuxOP•2y ago

inside controller aka endpoint

Unknown User•2y ago

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kaziuxOP•2y ago

   public class ConfigService : IConfigService
    {
        private readonly Configs _configs;

        public ConfigService(IOptions<Configs> configs)
        {
            _configs = configs.Value;
        }

        public void SetYear(int year)
        {

            _configs.ConfigurableYear = year;          
        }
}

   public class ConfigService : IConfigService
    {
        private readonly Configs _configs;

        public ConfigService(IOptions<Configs> configs)
        {
            _configs = configs.Value;
        }

        public void SetYear(int year)
        {

            _configs.ConfigurableYear = year;          
        }
}

Also, I do in this Startup.cs to bind this section

            services.Configure<Configs>(options => Configuration.GetSection("ConfigurableYear").Bind(options));

            services.Configure<Configs>(options => Configuration.GetSection("ConfigurableYear").Bind(options));

Unknown User•2y ago

Message Not Public

MODiX•2y ago

appsettings.json:

{
  "My": {
    "Foo": {
      "Kix": 5
    }
  }
}

{
  "My": {
    "Foo": {
      "Kix": 5
    }
  }
}

src/Foo/FooOptions.cs:

public class FooOptions
{
  public const string SectionName = "My:Foo";

  public string Bar {get;set;} = "default value for bar";
  public int Kix {get;set;} = -1;
  public DateTime? Pouet {get;set;} = default;
}

public class FooOptions
{
  public const string SectionName = "My:Foo";

  public string Bar {get;set;} = "default value for bar";
  public int Kix {get;set;} = -1;
  public DateTime? Pouet {get;set;} = default;
}

src/Foo/FooServiceCollectionExtensions.cs:

namespace Microsoft.Extensions.DependencyInjection; // <==== recommanded for service.Add so that you don't clutter Startup file

public class FooServiceCollectionExtensions
{
  public static IServiceCollection AddFoo(this IServiceCollection services) =>
    services
      .AddOptions<FooOptions>()
      .BindConfiguration(FooOptions.SectionName)
      .Validate(options => options.Kix >= 0, $"The configuration key '{FooOptions.SectionName}:{nameof(Kix)}' cannot be negative")
      ;

  public static IServiceCollection AddFoo(this IServiceCollection services, Action<FooOptions> configure) =>
    services
      .AddFoo()
      .Configure(configure);

namespace Microsoft.Extensions.DependencyInjection; // <==== recommanded for service.Add so that you don't clutter Startup file

public class FooServiceCollectionExtensions
{
  public static IServiceCollection AddFoo(this IServiceCollection services) =>
    services
      .AddOptions<FooOptions>()
      .BindConfiguration(FooOptions.SectionName)
      .Validate(options => options.Kix >= 0, $"The configuration key '{FooOptions.SectionName}:{nameof(Kix)}' cannot be negative")
      ;

  public static IServiceCollection AddFoo(this IServiceCollection services, Action<FooOptions> configure) =>
    services
      .AddFoo()
      .Configure(configure);

Program.cs / Startup.cs:

services.AddFoo();
// or
services.AddFoo(fooOptions => fooOptions.Kix = 12);

services.AddFoo();
// or
services.AddFoo(fooOptions => fooOptions.Kix = 12);

Bar.cs:

public class Bar
{
  private readonly FooOptions _fooOptions;

  // .Value in ctor is fine only if it's always ever a non-changing value (no reload and/or no scoped resolution)
  public Bar(IOptions<FooOptions> fooOptions)
    => _fooOptions = fooOptions.Value;
}

public class Bar
{
  private readonly FooOptions _fooOptions;

  // .Value in ctor is fine only if it's always ever a non-changing value (no reload and/or no scoped resolution)
  public Bar(IOptions<FooOptions> fooOptions)
    => _fooOptions = fooOptions.Value;
}

Unknown User•2y ago

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kaziuxOP•2y ago

But I must have option for user aka admin to set a value

Unknown User•2y ago

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kaziuxOP•2y ago

because one of requirements make that value editable. So system admin must change value who can be non-tech person

Unknown User•2y ago

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kaziuxOP•2y ago

value is must set configurable runtime

Unknown User•2y ago

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kaziuxOP•2y ago

The case if for some reason you can't save the value sucessfully

Unknown User•2y ago

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kaziuxOP•2y ago

That is the case I faced prieviously when value is saved on the bin/debug edition of the appsettings.json so the value be 1

Unknown User•2y ago

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kaziuxOP•2y ago

It depends if have reload on change or not

Unknown User•2y ago

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kaziuxOP•2y ago

If saved in the DB it would be fine but I'm not 100proc sure about some kind of the file

MODiX•2y ago

tebeco#0205

sounds like what Azure AppConfiguration does / could do

Quoted by

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kaziuxOP•2y ago

Much safer case have custom json with user configurable values

Unknown User•2y ago

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kaziuxOP•2y ago

Sorry, but I'm not hosting this project on the free Azure plan but if hosting would be the case, I must pretty aware of that.

Unknown User•2y ago

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Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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✅ How to edit and save specific appsettings.json (project root) section?